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| 1 | +/* |
| 2 | + * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved. |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | + * |
| 5 | + * This code is free software; you can redistribute it and/or modify it |
| 6 | + * under the terms of the GNU General Public License version 2 only, as |
| 7 | + * published by the Free Software Foundation. |
| 8 | + * |
| 9 | + * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | + * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | + * accompanied this code). |
| 14 | + * |
| 15 | + * You should have received a copy of the GNU General Public License version |
| 16 | + * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | + * |
| 19 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | + * or visit www.oracle.com if you need additional information or have any |
| 21 | + * questions. |
| 22 | + */ |
| 23 | +import org.testng.annotations.Test; |
| 24 | + |
| 25 | +import java.util.List; |
| 26 | +import java.util.function.Consumer; |
| 27 | +import java.util.stream.Collectors; |
| 28 | +import java.util.stream.Stream; |
| 29 | + |
| 30 | +import static org.testng.Assert.assertEquals; |
| 31 | + |
| 32 | +/* |
| 33 | + * THE CONTENTS OF THIS FILE HAVE TO BE IN SYNC WITH THE EXAMPLES USED IN THE JAVADOC. |
| 34 | + * |
| 35 | + * @test |
| 36 | + * @run testng/othervm JavadocExamples |
| 37 | + * @summary Checks to ensure example code displayed in the API documentation of |
| 38 | + * java/util/Stream compiles correctly. |
| 39 | + */ |
| 40 | +public class JavadocExamples { |
| 41 | + |
| 42 | + // From mapMulti |
| 43 | + @Test |
| 44 | + public void testNumberIntegerExample() { |
| 45 | + Stream<Number> numbers = Stream.of(1, 2, 3.0); |
| 46 | + List<Integer> integers = numbers.<Integer>mapMulti((number, consumer) -> { |
| 47 | + if (number instanceof Integer i) |
| 48 | + consumer.accept(i); |
| 49 | + }) |
| 50 | + .collect(Collectors.toList()); |
| 51 | + |
| 52 | + assertEquals(integers, List.of(1,2)); |
| 53 | + } |
| 54 | + @Test |
| 55 | + public void testExpandIterableExample() { |
| 56 | + var nestedList = List.of(1, List.of(2, List.of(3, 4)), 5); |
| 57 | + Stream<Object> expandedStream = nestedList.stream().mapMulti(C::expandIterable); |
| 58 | + |
| 59 | + assertEquals(expandedStream.toList(), List.of(1,2,3,4,5)); |
| 60 | + } |
| 61 | + static class C { |
| 62 | + static void expandIterable(Object e, Consumer<Object> c) { |
| 63 | + if (e instanceof Iterable<?> elements) { |
| 64 | + for (Object ie : elements) { |
| 65 | + expandIterable(ie, c); |
| 66 | + } |
| 67 | + } else if (e != null) { |
| 68 | + c.accept(e); |
| 69 | + } |
| 70 | + } |
| 71 | + } |
| 72 | +} |
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